从网络获取JSON格式数据

    public JSONObject getJson() {JSONObject resultJson = null;if ("".equals(this.mUrl) || this.mUrl == null) {return null;}HttpClient httpClient = this.getHttpClient();StringBuilder uriStringBuilder = new StringBuilder(this.mUrl);StringBuilder resultStringBuilder = new StringBuilder();HttpGet httpGet = new HttpGet(uriStringBuilder.toString());BufferedReader bufferReader = null;HttpResponse httpResponse = null;try {httpResponse = httpClient.execute(httpGet);} catch (Exception e) {return null;}int status = httpResponse.getStatusLine().getStatusCode();if (HttpStatus.SC_OK == status) {HttpEntity entity = httpResponse.getEntity();if (entity != null) {try {bufferReader = new BufferedReader(new InputStreamReader(entity.getContent(), "UTF-8"), 8192);String line = null;while ((line = bufferReader.readLine()) != null) {resultStringBuilder.append(line + "/n");}resultJson = new JSONObject(resultStringBuilder.toString());} catch (Exception e) {System.out.println("fail fail fail");} finally {try {bufferReader.close();} catch (IOException e) {System.out.println("fail fail fail");e.printStackTrace();}}}} else {return null;}return resultJson;}    public HttpClient getHttpClient() {this.mHttpParams = new BasicHttpParams();HttpConnectionParams.setConnectionTimeout(this.mHttpParams, 20 * 1000);HttpConnectionParams.setSoTimeout(this.mHttpParams, 20 * 1000);HttpConnectionParams.setSocketBufferSize(this.mHttpParams, 8192);HttpClientParams.setRedirecting(this.mHttpParams, true);HttpClient client = new DefaultHttpClient(this.mHttpParams);return client;}